When starting up Starscape, the main menu screens all have music and sound effects. However, when I begin a game, there's no sound whatsoever. Except for the silence, the gameplay is normal. Is this a software bug? Or something incorrectly configured in my hardware?

The game doesn't crash, thankfully enough, so no error message popups. Just no sound in the intro and actual gameplay. It's only when I exit the game and return back to the main menu that the music appears.